what fish to get

[Amstar]

okay I have a 75 gallon reef tank with only a mandarin, a small clown, and a royal gamma in it.  I have 125 bucks to spend (at Joel's) so I guess its mostly of what he has in stock LOL for fish.  I was thinking I want to go small  my thoughts

6 line wrasse
4 to 5 green chromis
fire fish??

or any other ideas people may have.

Looking for alot of movement in the tank besides corals.

[MechanicalEngineer]

I would not purchase any wrasses since they will out-compete the mandarin for food.  They're too fast and too hungry.  The firefish and the gramma might have territorial issues since they have similar body shapes.